AppleInsider was able to confirm the new iCloud security feature is indeed Apple's normal two-factor authentication service, though it is unclear if the feature is in testing or nearing rollout. Certain Apple ID accounts we tested required the second verification, while though others did not.

Like the Apple ID security, two-factor verification sends a PIN to a smartphone to unlock the account in addition to the standard login credentials. On iOS, the PIN can come as either a text message or system notification.

I tried with a couple of my accounts and I didnít get prompted. So Iíd guess either Apple is rolling this out in phases or it is just a test. Either way, it would seem safe to assume that at some point Apple looks to implement the security feature.